ci starts bisection 2025-06-28 08:06:29.771014217 +0000 UTC m=+10218.535072680
bisecting fixing commit since ab75170520d4964f3acf8bb1f91d34cbc650688e
building syzkaller on f3558dbf032eab2b77c1cb11b9ce2baffe7838d3
ensuring issue is reproducible on original commit ab75170520d4964f3acf8bb1f91d34cbc650688e
testing commit ab75170520d4964f3acf8bb1f91d34cbc650688e gcc
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: c2fca63fb7c72c7bf9ec3a9fbefa4cc929b87413eea0e9a84a480b8b22272848
all runs: crashed: INFO: task hung in iterate_supers
representative crash: INFO: task hung in iterate_supers, types: [HANG]
check whether we can drop unnecessary instrumentation
disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG], they are not needed
testing commit ab75170520d4964f3acf8bb1f91d34cbc650688e gcc
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 82752250d93b455f34b7953eada0cd9408f8cd679fb9e471d7a4d6fb2cedcdff
all runs: crashed: INFO: task hung in iterate_supers
representative crash: INFO: task hung in iterate_supers, types: [HANG]
the bug reproduces without the instrumentation
disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG], they are not needed
kconfig minimization: base=4089 full=8243 leaves diff=2144
split chunks (needed=false): <2144>
split chunk #0 of len 2144 into 5 parts
testing without sub-chunk 1/5
disabling configs for [UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK], they are not needed
testing commit ab75170520d4964f3acf8bb1f91d34cbc650688e gcc
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 0ae56617cb09c241764ba09da136f98f82756427731b339fe3fa020e7a525fa1
all runs: crashed: INFO: task hung in iterate_supers
representative crash: INFO: task hung in iterate_supers, types: [HANG]
the chunk can be dropped
testing without sub-chunk 2/5
disabling configs for [BUG KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN], they are not needed
testing commit ab75170520d4964f3acf8bb1f91d34cbc650688e gcc
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
failed building ab75170520d4964f3acf8bb1f91d34cbc650688e: drivers/gpu/drm/bridge/aux-bridge.c:116: undefined reference to `devm_drm_of_get_bridge'
testing without sub-chunk 3/5
disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing commit ab75170520d4964f3acf8bb1f91d34cbc650688e gcc
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 0bf11ae5574615bc087b4783dc31c254d118fcad47073512994cd04f42fafb2c
all runs: crashed: INFO: task hung in iterate_supers
representative crash: INFO: task hung in iterate_supers, types: [HANG]
the chunk can be dropped
testing without sub-chunk 4/5
disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing commit ab75170520d4964f3acf8bb1f91d34cbc650688e gcc
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: db27981da3cfaa80b8e362e19bb904f119f8e06976ca69a1587c795446403dbe
all runs: crashed: INFO: task hung in iterate_supers
representative crash: INFO: task hung in iterate_supers, types: [HANG]
the chunk can be dropped
testing without sub-chunk 5/5
disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP LEAK UBSAN BUG], they are not needed
testing commit ab75170520d4964f3acf8bb1f91d34cbc650688e gcc
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 56155b92024e35e6713ce13f1ace6d06cefc07a47b9dee2e5f079be39d6398b3
all runs: crashed: INFO: task hung in iterate_supers
representative crash: INFO: task hung in iterate_supers, types: [HANG]
the chunk can be dropped
minimized to 429 configs; suspects: [6LOWPAN ARCH_ENABLE_MEMORY_HOTREMOVE ASUS_WMI CHARGER_BQ24190 CMA COMMON_CLK DAX DLM DRM DRM_BRIDGE DRM_CLIENT_SELECTION DRM_DISPLAY_DP_AUX_BUS DRM_DISPLAY_DP_HELPER DRM_DISPLAY_DSC_HELPER DRM_DISPLAY_HDCP_HELPER DRM_DISPLAY_HDMI_HELPER DRM_DISPLAY_HELPER DRM_FBDEV_EMULATION DRM_GEM_SHMEM_HELPER DRM_GM12U320 DRM_GUD DRM_I915 DRM_I915_CAPTURE_ERROR DRM_I915_COMPRESS_ERROR DRM_I915_USERPTR DRM_KMS_HELPER DRM_MIPI_DSI DRM_PANEL DRM_PANEL_BRIDGE DRM_PANEL_EDP DRM_PANEL_ORIENTATION_QUIRKS DRM_SIMPLEDRM DRM_TTM DRM_TTM_HELPER DRM_UDL DRM_VGEM DRM_VIRTIO_GPU DRM_VIRTIO_GPU_KMS DRM_VKMS DRM_VMWGFX DUMMY DVB_AF9013 DVB_AF9033 DVB_AS102 DVB_AS102_FE DVB_B2C2_FLEXCOP DVB_B2C2_FLEXCOP_USB DVB_CORE DVB_DIB3000MB DVB_DIB3000MC DVB_EC100 DVB_GP8PSK_FE DVB_RTL2830 DVB_RTL2832 DVB_RTL2832_SDR DVB_TEST_DRIVERS DVB_TTUSB_BUDGET DVB_TTUSB_DEC DVB_USB DVB_USB_A800 DVB_USB_AF9005 DVB_USB_AF9005_REMOTE DVB_USB_AF9015 DVB_USB_AF9035 DVB_USB_ANYSEE DVB_USB_AU6610 DVB_USB_AZ6007 DVB_USB_AZ6027 DVB_USB_CE6230 DVB_USB_CINERGY_T2 DVB_USB_CXUSB DVB_USB_CXUSB_ANALOG DVB_USB_DIB0700 DVB_USB_DIB3000MC DVB_USB_DIBUSB_MB DVB_USB_DIBUSB_MC DVB_USB_DIGITV DVB_USB_DTT200U DVB_USB_DTV5100 DVB_USB_DVBSKY DVB_USB_DW2102 DVB_USB_EC168 DVB_USB_GL861 DVB_USB_GP8PSK DVB_USB_LME2510 DVB_USB_M920X DVB_USB_MXL111SF DVB_USB_NOVA_T_USB2 DVB_USB_OPERA1 DVB_USB_PCTV452E DVB_USB_RTL28XXU DVB_USB_TECHNISAT_USB2 DVB_USB_TTUSB2 DVB_USB_UMT_010 DVB_USB_V2 DVB_USB_VP702X DVB_USB_VP7045 DVB_USB_ZD1301 DVB_VIDTV DVB_ZL10353 ECRYPT_FS ECRYPT_FS_MESSAGING EDAC EFS_FS ENCRYPTED_KEYS EQUALIZER EROFS_FS EROFS_FS_BACKED_BY_FILE EROFS_FS_POSIX_ACL EROFS_FS_SECURITY EROFS_FS_XATTR EROFS_FS_ZIP EVM EVM_ADD_XATTRS EVM_ATTR_FSUUID EXFAT_FS EXPORTFS_BLOCK_OPS EXT3_FS EXT3_FS_POSIX_ACL EXT3_FS_SECURITY EXTCON EXTCON_INTEL_CHT_WC EXTCON_PTN5150 EXTCON_USBC_TUSB320 F2FS_CHECK_FS F2FS_FAULT_INJECTION F2FS_FS F2FS_FS_COMPRESSION F2FS_FS_LZ4 F2FS_FS_LZ4HC F2FS_FS_LZO F2FS_FS_LZORLE F2FS_FS_POSIX_ACL F2FS_FS_SECURITY F2FS_FS_XATTR F2FS_FS_ZSTD F2FS_STAT_FS FANOTIFY FANOTIFY_ACCESS_PERMISSIONS FB FB_CFB_COPYAREA FB_CFB_FILLRECT FB_CFB_IMAGEBLIT FB_CORE FB_DEFERRED_IO FB_DEVICE FB_IOMEM_FOPS FB_IOMEM_HELPERS FB_NOTIFY FB_SYSMEM_FOPS FB_SYSMEM_HELPERS FB_SYSMEM_HELPERS_DEFERRED FB_SYS_COPYAREA FB_SYS_FILLRECT FB_SYS_IMAGEBLIT FB_TILEBLITTING FB_VESA FB_VGA16 FB_VIRTUAL FDDI FIREWIRE FIREWIRE_NET FIREWIRE_OHCI FIREWIRE_SBP2 FONT_8x16 FONT_8x8 FONT_SUPPORT FRAMEBUFFER_CONSOLE FRAMEBUFFER_CONSOLE_DETECT_PRIMARY FRAMEBUFFER_CONSOLE_ROTATION FS_DAX FS_DAX_PMD FS_ENCRYPTION FS_ENCRYPTION_ALGS FS_STACK FS_VERITY FS_VERITY_BUILTIN_SIGNATURES FTL FUSE_DAX FUSE_FS FW_LOADER_COMPRESS FW_LOADER_PAGED_BUF FW_LOADER_SYSFS FW_LOADER_USER_HELPER FW_LOADER_USER_HELPER_FALLBACK GACT_PROB GARP GENERIC_PHY GENERIC_PTDUMP GET_FREE_REGION GFS2_FS GFS2_FS_LOCKING_DLM GNSS GNSS_USB GOOGLE_COREBOOT_TABLE GOOGLE_FIRMWARE GOOGLE_MEMCONSOLE GOOGLE_MEMCONSOLE_COREBOOT GOOGLE_VPD GPIOLIB GPIOLIB_IRQCHIP GPIO_ACPI GPIO_DLN2 GPIO_LJCA GPIO_VIPERBOARD GREENASIA_FF GREYBUS GREYBUS_BRIDGED_PHY GREYBUS_ES2 GREYBUS_HID GREYBUS_USB GTP GUEST_PERF_EVENTS GVE HAVE_ARCH_NODE_DEV_GROUP HAVE_ARCH_USERFAULTFD_MINOR HAVE_ARCH_USERFAULTFD_WP HAVE_BOOTMEM_INFO_NODE HAVE_CLK_PREPARE HAVE_EISA HAVE_KVM_CPU_RELAX_INTERCEPT HAVE_KVM_DIRTY_RING HAVE_KVM_DIRTY_RING_ACQ_REL HAVE_KVM_DIRTY_RING_TSO HAVE_KVM_IRQCHIP HAVE_KVM_IRQ_BYPASS HAVE_KVM_IRQ_ROUTING HAVE_KVM_MSI HAVE_KVM_NO_POLL HAVE_KVM_PFNCACHE HAVE_KVM_PM_NOTIFIER HAVE_KVM_READONLY_MEM HAVE_SCHED_AVG_IRQ HDLC HDLC_CISCO HDLC_FR HDLC_PPP HDLC_RAW HDLC_RAW_ETH HDLC_X25 HDMI HFSPLUS_FS HFS_FS HID_ACCUTOUCH HID_ACRUX HID_ACRUX_FF HID_ALPS HID_APPLEIR HID_ASUS HID_AUREAL HID_BATTERY_STRENGTH HID_BETOP_FF HID_BIGBEN_FF HID_CMEDIA HID_CORSAIR HID_COUGAR HID_CP2112 HID_CREATIVE_SB0540 HID_ELAN HID_ELECOM HID_ELO HID_EMS_FF HID_EVISION HID_FT260 HID_GEMBIRD HID_GFRM HID_GLORIOUS HID_GOOGLE_STADIA_FF HID_GREENASIA HID_GT683R HID_HOLTEK HID_ICADE HID_JABRA HID_KEYTOUCH HID_KYE HID_LCPOWER HID_LED HID_LENOVO HID_LETSKETCH HID_LOGITECH HID_LOGITECH_DJ HID_LOGITECH_HIDPP HID_MACALLY HID_MAGICMOUSE HID_MALTRON HID_MAYFLASH HID_MCP2200 HID_MCP2221 HID_MEGAWORLD_FF HID_MULTITOUCH HID_NTI HID_ORTEK HID_PENMOUNT HID_PICOLCD HID_PICOLCD_BACKLIGHT HID_PICOLCD_CIR HID_PICOLCD_FB HID_PICOLCD_LCD HID_PICOLCD_LEDS HID_PLANTRONICS HID_PRIMAX HID_PRODIKEYS HID_PXRC HID_RAZER HID_RETRODE HID_RMI HID_ROCCAT HID_SAITEK HID_SEMITEK HID_SENSOR_ACCEL_3D HID_SENSOR_ALS HID_SENSOR_CUSTOM_INTEL_HINGE HID_SENSOR_CUSTOM_SENSOR HID_SENSOR_DEVICE_ROTATION HID_SENSOR_GYRO_3D HID_SENSOR_HUB HID_SENSOR_HUMIDITY HID_SENSOR_IIO_COMMON HID_SENSOR_IIO_TRIGGER HID_SENSOR_INCLINOMETER_3D HID_SENSOR_MAGNETOMETER_3D HID_SENSOR_PRESS HID_SENSOR_PROX HID_SENSOR_TEMP HID_SIGMAMICRO HID_SPEEDLINK HID_STEELSERIES HID_THINGM HID_TIVO HID_TOPRE HID_TWINHAN HID_U2FZERO HID_UCLOGIC HID_UDRAW_PS3 HID_VIEWSONIC HID_VIVALDI HID_VIVALDI_COMMON HID_VRC2 HID_WACOM HID_WALTOP HID_WIIMOTE HID_XIAOMI HID_XINMO HID_ZYDACRON HMM_MIRROR HOLTEK_FF HOTPLUG_PCI_PCIE HPET_MMAP HPET_MMAP_DEFAULT HPFS_FS I2C_ALGOBIT I2C_CHARDEV I2C_CP2615 I2C_DESIGNWARE_CORE I2C_DESIGNWARE_PLATFORM I2C_DIOLAN_U2C I2C_DLN2 I2C_HID_ACPI I2C_HID_CORE I2C_HID_OF I2C_LJCA I2C_MUX I2C_MUX_REG I2C_ROBOTFUZZ_OSIF I2C_SI4713 I2C_SLAVE I2C_SLAVE_EEPROM I2C_TINY_USB I2C_VIPERBOARD IEEE802154 IEEE802154_6LOWPAN IEEE802154_ATUSB IEEE802154_DRIVERS IEEE802154_HWSIM IEEE802154_NL802154_EXPERIMENTAL IEEE802154_SOCKET IFB IIO IIO_BUFFER IIO_KFIFO_BUF IIO_TRIGGER IIO_TRIGGERED_BUFFER IKCONFIG IKCONFIG_PROC IMA IMA_APPRAISE IMA_APPRAISE_MODSIG IMA_DEFAULT_HASH_SHA256 IMA_LSM_RULES IMA_MEASURE_ASYMMETRIC_KEYS IMA_NG_TEMPLATE IMA_QUEUE_EARLY_BOOT_KEYS IMA_READ_POLICY IMA_WRITE_POLICY INET6_ESPINTCP INET6_ESP_OFFLOAD INET6_IPCOMP INET6_TUNNEL INET6_XFRM_TUNNEL INET_AH INET_DCCP_DIAG INET_DIAG INET_DIAG_DESTROY INET_ESP INET_ESPINTCP INET_ESP_OFFLOAD INET_IPCOMP INET_MPTCP_DIAG INET_RAW_DIAG INET_SCTP_DIAG INET_TCP_DIAG INET_UDP_DIAG INET_XFRM_TUNNEL INFINIBAND INFINIBAND_ADDR_TRANS INFINIBAND_ADDR_TRANS_CONFIGFS INFINIBAND_IPOIB INFINIBAND_IPOIB_CM INFINIBAND_IPOIB_DEBUG INFINIBAND_ISER INFINIBAND_ON_DEMAND_PAGING INFINIBAND_RTRS INFINIBAND_SRP INFINIBAND_USER_ACCESS INFINIBAND_USER_MAD INFINIBAND_USER_MEM INPUT_ATI_REMOTE2 INPUT_CM109 INPUT_IMS_PCU INPUT_JOYDEV INPUT_KEYSPAN_REMOTE INPUT_LEDS INPUT_MOUSEDEV INPUT_MOUSEDEV_PSAUX INPUT_POWERMATE INPUT_UINPUT INPUT_YEALINK INTEGRITY INTEGRITY_ASYMMETRIC_KEYS INTEGRITY_AUDIT INTEGRITY_SIGNATURE INTEGRITY_TRUSTED_KEYRING INTEL_CHTWC_INT33FE INTEL_IDMA64 INTEL_IOATDMA INTEL_IOMMU_DEFAULT_ON INTEL_IOMMU_SVM INTEL_ISHTP_ECLITE INTEL_ISH_FIRMWARE_DOWNLOADER INTEL_ISH_HID INTEL_SOC_PMIC_CHTWC INTERVAL_TREE_SPAN_ITER IOMMUFD IOMMUFD_DRIVER IOMMUFD_DRIVER_CORE IOMMUFD_TEST IP6_NF_MATCH_AH IP6_NF_MATCH_EUI64 IP6_NF_MATCH_FRAG IP6_NF_MATCH_HL IP6_NF_MATCH_MH IP6_NF_MATCH_OPTS IP6_NF_MATCH_RPFILTER IP6_NF_MATCH_RT IP6_NF_MATCH_SRH IP6_NF_NAT IP6_NF_RAW IP6_NF_SECURITY IP6_NF_TARGET_HL IP6_NF_TARGET_MASQUERADE IP6_NF_TARGET_NPT IP6_NF_TARGET_SYNPROXY IPV6_FOU IPV6_FOU_TUNNEL IPV6_GRE IPV6_ILA IPV6_MIP6 IPV6_MROUTE IPV6_MROUTE_MULTIPLE_TABLES IPV6_MULTIPLE_TABLES IPV6_OPTIMISTIC_DAD IPV6_PIMSM_V2 IPV6_ROUTER_PREF IPV6_ROUTE_INFO IPV6_RPL_LWTUNNEL IPV6_SEG6_BPF IPV6_SEG6_HMAC IPV6_SEG6_LWTUNNEL IPV6_SIT_6RD IPV6_SUBTREES IPV6_TUNNEL IPV6_VTI IPVLAN IPVLAN_L3S IPVTAP IP_DCCP IP_DCCP_CCID3 IP_DCCP_TFRC_LIB IP_FIB_TRIE_STATS IP_MROUTE_MULTIPLE_TABLES IP_NF_ARPFILTER IP_NF_ARPTABLES IP_NF_ARP_MANGLE IP_NF_MATCH_AH IP_NF_MATCH_ECN IP_NF_MATCH_RPFILTER IP_NF_MATCH_TTL IP_NF_RAW IP_NF_SECURITY IP_NF_TARGET_ECN IP_NF_TARGET_NETMAP IP_NF_TARGET_REDIRECT IP_NF_TARGET_SYNPROXY IP_NF_TARGET_TTL IP_ROUTE_CLASSID IP_SCTP IP_SET IP_SET_BITMAP_IP IP_SET_BITMAP_IPMAC IP_SET_BITMAP_PORT IP_SET_HASH_IP IP_SET_HASH_IPMAC IP_SET_HASH_IPMARK IP_SET_HASH_IPPORT IP_SET_HASH_IPPORTIP IP_SET_HASH_IPPORTNET IP_SET_HASH_MAC IP_SET_HASH_NET IP_SET_HASH_NETIFACE IP_SET_HASH_NETNET IP_SET_HASH_NETPORT IRQ_TIME_ACCOUNTING LAPB LCD_CLASS_DEVICE MAC802154 MCORE2 MEDIA_DIGITAL_TV_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_TEST_SUPPORT MEDIA_USB_SUPPORT MEMORY_HOTPLUG MEMORY_HOTREMOVE MFD_DLN2 MFD_VIPERBOARD MPTCP MTD NETFILTER_ADVANCED NET_ACT_GACT NET_ACT_MIRRED NET_IPGRE_DEMUX NFT_COMPAT NFT_COMPAT_ARP NFT_FWD_NETDEV NF_TABLES NF_TABLES_ARP NF_TABLES_NETDEV RADIO_ADAPTERS RADIO_SI4713 RAS RC_CORE REGULATOR RFKILL SND SOUND STAGING TRANSPARENT_HUGEPAGE TYPEC TYPEC_MUX_PI3USB30532 USB_LJCA USB_ROLES_INTEL_XHCI USB_ROLE_SWITCH VIDEO_DEV VIRTIO_FS WAN ZONE_DEVICE]
disabling configs for [LEAK UBSAN BUG KASAN LOCKDEP ATOMIC_SLEEP], they are not needed
testing current HEAD aaf724ed69264719550ec4f194d3ab17b886af9a
testing commit aaf724ed69264719550ec4f194d3ab17b886af9a gcc
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: ff15dd05b5d6a92531e029757ea2159050d0369c0fdde0c0428de95d910be873
all runs: crashed: INFO: task hung in __iterate_supers
representative crash: INFO: task hung in __iterate_supers, types: [HANG]
crash still not fixed/happens on the oldest tested release
revisions tested: 7, total time: 2h31m28.855801957s (build: 1h32m3.441962903s, test: 49m17.546366057s)
crash still not fixed or there were kernel test errors
commit msg: Merge tag 'v6.16-rc3-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6
crash: INFO: task hung in __iterate_supers
INFO: task syz.4.20:3139 blocked for more than 143 seconds.
Not tainted 6.16.0-rc3-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.20 state:D stack:14288 pid:3139 tgid:3138 ppid:2663 task_flags:0x400040 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5396 [inline]
__schedule+0x593/0xd20 kernel/sched/core.c:6785
__schedule_loop kernel/sched/core.c:6863 [inline]
schedule+0x25/0x110 kernel/sched/core.c:6878
super_lock+0xcd/0x150 fs/super.c:115
__iterate_supers+0xd0/0x170 fs/super.c:923
ksys_sync+0x3e/0xa0 fs/sync.c:102
__do_sys_sync+0x9/0x10 fs/sync.c:113
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x6d/0x2d0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f01fb385d29
RSP: 002b:00007f01fc293038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f01fb575fa0 RCX: 00007f01fb385d29
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f01fb575fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f01fb575fa0 R15: 00007ffd928fce38
INFO: task syz.2.18:4763 blocked for more than 143 seconds.
Not tainted 6.16.0-rc3-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.18 state:D stack:14648 pid:4763 tgid:4762 ppid:3140 task_flags:0x400040 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5396 [inline]
__schedule+0x593/0xd20 kernel/sched/core.c:6785
__schedule_loop kernel/sched/core.c:6863 [inline]
schedule+0x25/0x110 kernel/sched/core.c:6878
super_lock+0xcd/0x150 fs/super.c:115
__iterate_supers+0xd0/0x170 fs/super.c:923
ksys_sync+0x3e/0xa0 fs/sync.c:102
__do_sys_sync+0x9/0x10 fs/sync.c:113
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x6d/0x2d0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6558785d29
RSP: 002b:00007f655967d038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f6558975fa0 RCX: 00007f6558785d29
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f6558975fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f6558975fa0 R15: 00007fff952d0e18
INFO: task syz.6.19:4797 blocked for more than 143 seconds.
Not tainted 6.16.0-rc3-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.19 state:D stack:14648 pid:4797 tgid:4796 ppid:3134 task_flags:0x400040 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5396 [inline]
__schedule+0x593/0xd20 kernel/sched/core.c:6785
__schedule_loop kernel/sched/core.c:6863 [inline]
schedule+0x25/0x110 kernel/sched/core.c:6878
super_lock+0xcd/0x150 fs/super.c:115
__iterate_supers+0xd0/0x170 fs/super.c:923
ksys_sync+0x3e/0xa0 fs/sync.c:102
__do_sys_sync+0x9/0x10 fs/sync.c:113
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x6d/0x2d0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc65e785d29
RSP: 002b:00007fc65f53a038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007fc65e975fa0 RCX: 00007fc65e785d29
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fc65e975fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fc65e975fa0 R15: 00007ffe8d5df3b8
INFO: task syz.7.17:4802 blocked for more than 143 seconds.
Not tainted 6.16.0-rc3-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.7.17 state:D stack:14248 pid:4802 tgid:4801 ppid:3132 task_flags:0x400040 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5396 [inline]
__schedule+0x593/0xd20 kernel/sched/core.c:6785
__schedule_loop kernel/sched/core.c:6863 [inline]
schedule+0x25/0x110 kernel/sched/core.c:6878
super_lock+0xcd/0x150 fs/super.c:115
__iterate_supers+0xd0/0x170 fs/super.c:923
ksys_sync+0x3e/0xa0 fs/sync.c:102
__do_sys_sync+0x9/0x10 fs/sync.c:113
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x6d/0x2d0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbdfd385d29
RSP: 002b:00007fbdfe296038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007fbdfd575fa0 RCX: 00007fbdfd385d29
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fbdfd575fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fbdfd575fa0 R15: 00007fff5adbed98
INFO: task syz.0.16:4805 blocked for more than 143 seconds.
Not tainted 6.16.0-rc3-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.16 state:D stack:14608 pid:4805 tgid:4804 ppid:3136 task_flags:0x400040 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5396 [inline]
__schedule+0x593/0xd20 kernel/sched/core.c:6785
__schedule_loop kernel/sched/core.c:6863 [inline]
schedule+0x25/0x110 kernel/sched/core.c:6878
super_lock+0xcd/0x150 fs/super.c:115
__iterate_supers+0xd0/0x170 fs/super.c:923
ksys_sync+0x3e/0xa0 fs/sync.c:102
__do_sys_sync+0x9/0x10 fs/sync.c:113
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x6d/0x2d0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbe27985d29
RSP: 002b:00007fbe286dc038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007fbe27b75fa0 RCX: 00007fbe27985d29
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fbe27b75fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fbe27b75fa0 R15: 00007ffd88ade178
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff837e4780 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff837e4780 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff837e4780 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x36/0x120 kernel/locking/lockdep.c:6770
2 locks held by getty/1637:
#0: ffff888102f9f8a0 (&tty->ldisc_sem){....}-{0:0}, at: tty_ldisc_ref_wait+0x23/0x60 drivers/tty/tty_ldisc.c:243
#1: ffffc9000321b2f0 (&ldata->atomic_read_lock){....}-{3:3}, at: n_tty_read+0x17a/0x660 drivers/tty/n_tty.c:2222
1 lock held by syz.4.20/3158:
#0: ffff8881032b60e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.2.18/4786:
#0: ffff88810a2a10e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.6.19/4806:
#0: ffff8881728b60e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.7.17/4807:
#0: ffff88810af900e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.0.16/4808:
#0: ffff88810af910e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.8.21/5228:
#0: ffff888105b320e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.3.23/6865:
#0: ffff88817288a0e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.1.25/6904:
#0: ffff88811160a0e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.9.22/6903:
#0: ffff8881729160e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.5.24/6905:
#0: ffff888168d020e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.4.26/7325:
#0: ffff8881728930e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.2.29/9001:
#0: ffff888174b5e0e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.7.28/9002:
#0: ffff888108f420e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.0.27/9003:
#0: ffff888108f470e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.6.30/9004:
#0: ffff88810dfc30e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.8.31/9424:
#0: ffff88810dfce0e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.5.34/11081:
#0: ffff88817287c0e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.9.32/11083:
#0: ffff88810cf000e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.3.33/11102:
#0: ffff88810cf310e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.1.35/11103:
#0: ffff88810cb550e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.4.36/11523:
#0: ffff88810cf060e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.0.37/13159:
#0: ffff888175c430e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.2.39/13199:
#0: ffff888175ffe0e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.6.40/13200:
#0: ffff888175f0e0e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.7.38/13201:
#0: ffff888175c470e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.8.41/13621:
#0: ffff888174de60e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.9.42/15290:
#0: ffff888174aec0e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.5.44/15294:
#0: ffff888175c4f0e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.3.43/15298:
#0: ffff8881742210e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.1.45/15299:
#0: ffff8881742260e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.4.46/15718:
#0: ffff8881742aa0e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.2.49/17418:
#0: ffff8881742b20e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.0.47/17459:
#0: ffff88816113e0e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.7.48/17485:
#0: ffff88816108d0e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.6.50/17500:
#0: ffff8881611520e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.8.51/17815:
#0: ffff88816133e0e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.1.55/19796:
#0: ffff88815fab90e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.9.52/19823:
#0: ffff88815f9540e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.5.54/19824:
#0: ffff88815fab50e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.3.53/19828:
#0: ffff88816134f0e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.4.56/19912:
#0: ffff88815f03d0e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.8.61/21918:
#0: ffff88815e4ed0e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.6.60/21994:
#0: ffff88815e5ac0e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.0.57/22004:
#0: ffff88815e4be0e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.7.58/22008:
#0: ffff88815f35f0e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
1 lock held by syz.2.59/22009:
#0: ffff88815dcdb0e0 (&type->s_umount_key#61/1){....}-{3:3}, at: alloc_super+0xe6/0x3c0 fs/super.c:345
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc3-syzkaller #0 PREEMPT(undef)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x5a/0x90 lib/dump_stack.c:120
nmi_cpu_backtrace+0xd4/0x110 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0xd5/0x140 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:307 [inline]
watchdog+0x652/0x690 kernel/hung_task.c:470
kthread+0x104/0x200 kernel/kthread.c:464
ret_from_fork+0x16f/0x190 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.16.0-rc3-syzkaller #0 PREEMPT(undef)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:82
Code: a1 aa 00 e9 13 1f 01 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 25 13 1b 00 fb f4 cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
RSP: 0018:ffffffff83603e80 EFLAGS: 000002c6
RAX: 000000000009abd4 RBX: ffffffff83688900 RCX: 00000031a0bae380
RDX: ffff888237c25028 RSI: ffffffff83275a32 RDI: ffffffff8327ff5b
RBP: 0000000000000000 R08: 0000000000080000 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff83688048 R15: 000000000008b000
FS: 0000000000000000(0000) GS:ffff8882b365a000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555822284a8 CR3: 0000000105f04000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
default_idle+0x13/0x20 arch/x86/kernel/process.c:749
default_idle_call+0x48/0x140 kernel/sched/idle.c:117
cpuidle_idle_call kernel/sched/idle.c:185 [inline]
do_idle+0x1d4/0x230 kernel/sched/idle.c:325
cpu_startup_entry+0x24/0x30 kernel/sched/idle.c:423
rest_init+0xed/0xf0 init/main.c:745
start_kernel+0x5ea/0x690 init/main.c:1102
x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:307
x86_64_start_kernel+0x103/0x120 arch/x86/kernel/head64.c:288
common_startup_64+0x13e/0x148